Method for making composite rings



A. 0. BURGESS. METHOD FOR MAKING COMPOSlTE RINGS. APPLICATION FILEDon. 1. 1920'.

1,415,520. Patented MayQ, 1922'.

UNITE s comralw, or, rn'ovrnmvcn, RHODE-ISLAND;

METHOD FOR MAKING colvrrosrrnlrcrnes.

Specification of Letters Patent.

. Patented May 9, 1922.

Application filed October 1 1920. Serial No. 414,009.

To all whomz't may concern:

Be it known that I, ANDREW O. BURGESS, a citizen of the United States,and a resident of Newark, county of Essex, and, State of New Jersey,have invented certain new and useful Improvements in Methods for MakingComposite Rings, of which the following is a specification.

This invention relates to an improved method for making composite rings,and

while it is applicable to many different articles and metals and alloysof metals, in order to make the description clear and its advantagesapparent I will particularly describe its application to the manufactureof fingerrings.

By my improved method it is possible to make a ring with a core or baseof a precious metal or semi-precious or base metal, and provide it witha covering of precious metal, the finished product having no seams orsoldered portions.

The invention is illustrated in a manner to make clear the successivesteps, and in the accompanying drawing Figure 1 is a plan and Figure 2an edge view of a blank of sheet metal. Figure 3 shows the blank formedinto acup-shaped article. Figures '1 and 5 are a plan and side view,respectively, of a ring used as a core or base of the finished article.Figure 6 is a section showing the cup and the ring assembled. Figure 7is a similar view showing the same elements with the edge of the cupcrimped over the ring. Figure 8 is a section to illustrate what parts ofthe structure of Figure 7 are removed, and Figure 9 is a side view ofthe finished article. 1

I provide, first, a sheet of metal, and for the purpose of illustrationI will mention platinum, which sheet 10 is shown in Flgures 1 and 2. Iform this sheet into a substantially cup-shaped article shown in sectionin Figure 3. This cup 11 is preferably made with its bottom inset, as at12,-to provide an annular seat 13 between the bottom 12 and the marginalflange or side wall 14:-

I provide also a ring or core 15, which may be hollow or solid, usuallysolid, and is of metal that melts at a lower temperature than the sheet10. For the purpose of description I will define the ring 15 as of gold.

The ring 15 is placed in the cup-shaped article, as in Figure 6, theparts being proportioned so as to provide a snug fit. The side walls 14are then folded over or crimped, as at 16, so that the ring is encasedand the joint 17. is. on the inner face of the ring. When it is desiredto insure a positive joining of the parts, the article shown in Figure 71s subjected to a temperature too low to affect the sheet of materialencasing the ring,

but high enough to. cause the ring itself to j so, I

fuse with the casing. In the form described the temperature would besufiicient to cause the gold to fuse with the inner face of theplatinumsheet, but the platinum would be unaffected.

The article is then operated on to remove V the center part, includingthe inner edge of the folded sheet and of the ring. This is clearlyshown in Figure 8, where, in the lower part of the figure, isillustrated at a the portion removed, but not showing exactly its shapeon removal, and in the upper part, as at b, is illustrated the finishedarticle.

It will be seen that the ring as shown in Figures 8 and 9-is seamless,that is, .there are no'soldered or welded joints around its periphery,and the ring has the appearance of a platinum ring, but its cost isless, as the core is of gold. This methodof ring making is applicable toarticles other than finger rings, and I do not wish to be understood aslimiting myself to these articles. p

What I term the finished article is finished so far as my method isconcerned and is usually ornamented and embellished on its surfacebefore it is ready for sale.

I claim:

1. A method of makinga composite ring sheet around the ring so that theedges of the 7 sheet are at the inner face of the ring, subjecting theparts thus assembled to a temperature to cause the ring tobe fused tothe sheet, and then cutting away the inneredge of the ring and of thefolded sheet.

3. A method of making a com osite ring comprising the provision of a sheet metal I metal, and then removing the inner edge oi the crimped sheetand of the ring.

In testimony that I claim the foregoing, I 10 have hereto set my hand,this 28th day of September, 1920.

ANDREW O. BURGESS.

